5’App-T4 DNA Ligase (RK20510)

5’App-T4 DNA Ligase is a mutant of T4 DNA Ligase without adenylation function, which can specifically ligates the pre-adenylated 5´ end of DNA or RNA to the 3´ end of DNA. This enzyme does not require ATP as a cofactor for ligation, but requires a pre-adenylated substrate. This enzyme reduces background ligation (chimera formation) during NGS library construction, because it can only use 5 ‘preadenylation adapter to the DNA fragments.

Circle Ligase (RK20508)

Circle Ligase is a thermostable ATP-dependent ligase that can catalyze the self-circularization of single-stranded DNA (ssDNA)/single-stranded RNA (ssRNA) strands simultaneously possessing a 5′-phosphate group and a 3′-hydroxyl group in the absence of complementary sequences, with the length of single-stranded DNA (ssDNA)/single-stranded RNA (ssRNA) being greater than 15bp.

E.coli DNA Ligase (RK20501)

E. coli DNA Ligase catalyzes the formation of a phosphodiester bond between the 5′-phosphate and the 3′-hydroxyl of two adjacent DNA strands in duplex DNA with cohesive ends. It is not appreciably active on blunt-ended substrates. E. coli DNA Ligase uses NAD as a cofactor and can be heat-inactivated. E. coli DNA Ligase is active at a range of temperatures (4°C – 37°C).

Heat-T4 DNA Ligase (RK21507)

Heat-T4 DNA Ligase is a thermostable mutant of T4 DNA Ligase that catalyzes the formation of a phosphodiester bond between juxtaposed 5´ phosphate and 3´ hydroxyl termini in duplex DNA or RNA. It is designed to function at higher temperatures than wild-type T4 DNA ligase. The catalytic reaction requires ATP as a cofactor. Heat-T4 DNA Ligase will join blunt end and cohesive end termini at temperatures as high as 45ºC , and can also repair single-stranded nicks in duplex DNA, RNA or DNA/RNA hybrids. At the same time, T4 DNA ligase closes the gaps in these DNA substrates.

High Salt-T4 DNA Ligase (RK21506)

High Salt-T4 DNA Ligase is a salt-tolerant mutant of T4 DNA Ligase that catalyzes the formation of a phosphodiester bond between juxtaposed 5´ phosphate and 3´ hydroxyl termini in duplex DNA or RNA. It is designed to function at higher salt concentrations than wild type T4 DNA Ligase. The catalytic reaction requires ATP as a cofactor. High Salt-T4 DNA Ligase will join blunt end and cohesive end termini at salt concentrations as high as 300 mM without any loss in activity, and can also repair single-stranded nicks in duplex DNA, RNA or DNA/RNA hybrids. At the same time, T4 DNA ligase closes the gaps in these DNA substrates.

Mth RNA Ligase (RK20515)

Mth RNA Ligase is an ATP-dependent ligase that can efficiently convert 5′-phosphorylated single-stranded DNA into 5′-adenylated DNA. The kit has been optimized to yield high quantities of adenylylated DNA regardless of whether the 3′ end of the single-stranded DNA has been aminated or otherwise modified. Typically, the modification efficiency can reach over 95%.

PBCV-1 DNA Ligase (RK20513)

PBCV-1 DNA Ligase, also known as PBCV DNA Ligase, SplintR™ Ligase, or Chorella virus DNA Ligase, is an ATP-dependent DNA ligase that efficiently catalyzes the joining of two adjacent DNA single strands using a complementary RNA strand as a splint. It remains active between 16-37°C. Common applications include the detection of small RNAs such as microRNAs using probe-based methods, utilizing DNA probes to connect and detect specific RNAs, SNP or alternative splicing detection, and RASL-seq analysis.

T3 DNA Ligase (RK20509)

T3 DNA Ligase is an ATP-dependent ds DNA ligase from bacteriophage T3. It can catalyze the formation of a phosphodiester bond between juxtaposed 5′ phosphate and 3′ hydroxyl termini in duplex DNA or RNA. T3 DNA Ligase will join blunt end and cohesive end termini. It and can also repair single-stranded nicks in duplex DNA, RNA or DNA/RNA hybrids and close the gaps in these DNA substrates. In addition, T3 DNA Ligase is more tolerant to NaCl than T4 DNA Ligase (2-fold).
As with T4 DNA Ligase , addition of PEG 6000 to the T3 DNA Ligase reaction system can improve the ligation efficiency of the blunt end. 1X T4 DNA Ligase Reaction Buffer can be used in some experiments where PEG 6000 is not available, but the activity of T3 DNA Ligase is reduced to 1/10. In applications where high concentrations of NaCl need to be maintained, we recommend the use of reaction buffers without PEG 6000.

T4 DNA Ligase (High Conc.) (RK21500)

T4 DNA Ligase catalyzes the formation of a phosphodiester bond between juxtaposed 5′ phosphate and 3′ hydroxyl termini in duplex DNA or RNA. This enzyme will join blunt end and cohesive end termini as well as repair single stranded nicks in duplex DNA and some DNA/RNA hybrids. T4 DNA ligase will seal nicks for these DNA substrates. T4 DNA Ligase is applicable to cloning of restriction fragments and to joining linkers and adapters to blunt-ended DNA.

T4 DNA Ligase (RK21501)

T4 DNA Ligase catalyzes the formation of a phosphodiester bond between juxtaposed 5′ phosphate and 3′ hydroxyl termini in duplex DNA or RNA. This enzyme will join blunt end and cohesive end termini as well as repair single stranded nicks in duplex DNA and some DNA/RNA hybrids. T4 DNA ligase will seal nicks for these DNA substrates. T4 DNA Ligase is applicable to cloning of restriction fragments and to joining linkers and adapters to blunt-ended DNA.

T4 RNA Ligase 1 (RK20503)

T4 RNA ligase 1 catalyzes the formation of a 3´ → 5´ phosphodiester bond by joining the 5´ phosphate end of a nucleotide to the 3´ hydroxyl end, accompanied by the hydrolysis of ATP to AMP and PPi. Substrates include single-stranded RNA, DNA, and dinucleoside pyrophosphates.

T4 RNA Ligase 2, truncated (RK20505)

T4 RNA Ligase 2, truncated (T4 Rnl2 truncated) specifically ligates the pre-adenylated 5´ end of DNA or RNA to the 3´ end of RNA. The enzyme does not require ATP for ligation but does need the pre-adenylated substrate. T4 Rnl2 truncated is expressed from a plasmid in E. coli which encodes the first 249 amino acids of the full length T4 RNA Ligase 2. Unlike the full length ligase, T4 Rnl2 truncated is unable to adenylate the 5´ end of the substrate, and as a result it cannot ligate the phosphorylated 5´ end of RNA or DNA to the 3´ end of RNA. This enzyme, also known as Rnl2 (1-249) has been used for optimized linker ligation for the cloning of microRNAs. This enzyme reduces background ligation because it can only use adenylated primers.